Step 1

In a large pot, cook pasta according to package directions. Drain and set aside.

Step 2

In a small bowl, whisk together the flour, onion powder, salt and pepper.

Step 3

In the same pot, melt the butter over medium heat and then whisk in the flour mixture, a little at a time, continuously whisking until the mixture is thick and starts to turn light brown, about a minute. Slowly whisk in the milk and continue to whisk until the mixture starts to thicken, about 3 minutes.

Step 4

Turn the heat to low and add the cheeses, whisking until melted. If the sauce is too thick, add a little more milk. If the sauce is too thin, add some more cheese until of desired consistency.

Step 5

Stir in the cooked pasta until thoroughly coated. Serve and enjoy!